:root{--primary:#3157d5;--secondary:#6c35d9;--accent:#19a974;--dark:#111827;--text:#4b5563;--light:#f5f7ff;--white:#fff;--border:#e5e7eb}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:Arial,Helvetica,sans-serif;color:var(--text);line-height:1.7;background:#fff}a{text-decoration:none}.container{width:min(1120px,92%);margin:auto}header{position:sticky;top:0;z-index:999;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}.nav{min-height:74px;display:flex;align-items:center;justify-content:space-between}.logo{font-size:28px;font-weight:900;color:var(--primary)}.logo span{color:var(--secondary)}.nav-links{list-style:none;display:flex;gap:25px}.nav-links a{color:var(--dark);font-weight:700;font-size:14px}.nav-links a:hover{color:var(--primary)}.menu{display:none;border:0;background:none;font-size:28px;cursor:pointer}.btn{display:inline-block;padding:14px 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